20979360

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{857}}^1$

素因数の和:895

約数の個数: 144

約数和(自身を含む): 75891816

約数和(自身を除く): 54912456

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 24, 30, 32, 34, 36, 40, 45, 48, 51, 60, 68, 72, 80, 85, 90, 96, 102, 120, 136, 144, 153, 160, 170, 180, 204, 240, 255, 272, 288, 306, 340, 360, 408, 480, 510, 544, 612, 680, 720, 765, 816, 857, 1020, 1224, 1360, 1440, 1530, 1632, 1714, 2040, 2448, 2571, 2720, 3060, 3428, 4080, 4285, 4896, 5142, 6120, 6856, 7713, 8160, 8570, 10284, 12240, 12855, 13712, 14569, 15426, 17140, 20568, 24480, 25710, 27424, 29138, 30852, 34280, 38565, 41136, 43707, 51420, 58276, 61704, 68560, 72845, 77130, 82272, 87414, 102840, 116552, 123408, 131121, 137120, 145690, 154260, 174828, 205680, 218535, 233104, 246816, 262242, 291380, 308520, 349656, 411360, 437070, 466208, 524484, 582760, 617040, 655605, 699312, 874140, 1048968, 1165520, 1234080, 1311210, 1398624, 1748280, 2097936, 2331040, 2622420, 3496560, 4195872, 5244840, 6993120, 10489680, 20979360]

約数ペア:

[(1, 20979360), (2, 10489680), (3, 6993120), (4, 5244840), (5, 4195872), (6, 3496560), (8, 2622420), (9, 2331040), (10, 2097936), (12, 1748280), (15, 1398624), (16, 1311210), (17, 1234080), (18, 1165520), (20, 1048968), (24, 874140), (30, 699312), (32, 655605), (34, 617040), (36, 582760), (40, 524484), (45, 466208), (48, 437070), (51, 411360), (60, 349656), (68, 308520), (72, 291380), (80, 262242), (85, 246816), (90, 233104), (96, 218535), (102, 205680), (120, 174828), (136, 154260), (144, 145690), (153, 137120), (160, 131121), (170, 123408), (180, 116552), (204, 102840), (240, 87414), (255, 82272), (272, 77130), (288, 72845), (306, 68560), (340, 61704), (360, 58276), (408, 51420), (480, 43707), (510, 41136), (544, 38565), (612, 34280), (680, 30852), (720, 29138), (765, 27424), (816, 25710), (857, 24480), (1020, 20568), (1224, 17140), (1360, 15426), (1440, 14569), (1530, 13712), (1632, 12855), (1714, 12240), (2040, 10284), (2448, 8570), (2571, 8160), (2720, 7713), (3060, 6856), (3428, 6120), (4080, 5142), (4285, 4896)]