20945700

素因数分解:

$2^2\times 3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{37}}^2$

素因数の和:111

約数の個数: 162

約数和(自身を含む): 71444646

約数和(自身を除く): 50498946

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 25, 30, 34, 36, 37, 45, 50, 51, 60, 68, 74, 75, 85, 90, 100, 102, 111, 148, 150, 153, 170, 180, 185, 204, 222, 225, 255, 300, 306, 333, 340, 370, 425, 444, 450, 510, 555, 612, 629, 666, 740, 765, 850, 900, 925, 1020, 1110, 1258, 1275, 1332, 1369, 1530, 1665, 1700, 1850, 1887, 2220, 2516, 2550, 2738, 2775, 3060, 3145, 3330, 3700, 3774, 3825, 4107, 5100, 5476, 5550, 5661, 6290, 6660, 6845, 7548, 7650, 8214, 8325, 9435, 11100, 11322, 12321, 12580, 13690, 15300, 15725, 16428, 16650, 18870, 20535, 22644, 23273, 24642, 27380, 28305, 31450, 33300, 34225, 37740, 41070, 46546, 47175, 49284, 56610, 61605, 62900, 68450, 69819, 82140, 93092, 94350, 102675, 113220, 116365, 123210, 136900, 139638, 141525, 188700, 205350, 209457, 232730, 246420, 279276, 283050, 308025, 349095, 410700, 418914, 465460, 566100, 581825, 616050, 698190, 837828, 1047285, 1163650, 1232100, 1396380, 1745475, 2094570, 2327300, 3490950, 4189140, 5236425, 6981900, 10472850, 20945700]

約数ペア:

[(1, 20945700), (2, 10472850), (3, 6981900), (4, 5236425), (5, 4189140), (6, 3490950), (9, 2327300), (10, 2094570), (12, 1745475), (15, 1396380), (17, 1232100), (18, 1163650), (20, 1047285), (25, 837828), (30, 698190), (34, 616050), (36, 581825), (37, 566100), (45, 465460), (50, 418914), (51, 410700), (60, 349095), (68, 308025), (74, 283050), (75, 279276), (85, 246420), (90, 232730), (100, 209457), (102, 205350), (111, 188700), (148, 141525), (150, 139638), (153, 136900), (170, 123210), (180, 116365), (185, 113220), (204, 102675), (222, 94350), (225, 93092), (255, 82140), (300, 69819), (306, 68450), (333, 62900), (340, 61605), (370, 56610), (425, 49284), (444, 47175), (450, 46546), (510, 41070), (555, 37740), (612, 34225), (629, 33300), (666, 31450), (740, 28305), (765, 27380), (850, 24642), (900, 23273), (925, 22644), (1020, 20535), (1110, 18870), (1258, 16650), (1275, 16428), (1332, 15725), (1369, 15300), (1530, 13690), (1665, 12580), (1700, 12321), (1850, 11322), (1887, 11100), (2220, 9435), (2516, 8325), (2550, 8214), (2738, 7650), (2775, 7548), (3060, 6845), (3145, 6660), (3330, 6290), (3700, 5661), (3774, 5550), (3825, 5476), (4107, 5100)]