21661560

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{647}}^1$

素因数の和:698

約数の個数: 128

約数和(自身を含む): 74649600

約数和(自身を除く): 52988040

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 31, 36, 40, 45, 54, 60, 62, 72, 90, 93, 108, 120, 124, 135, 155, 180, 186, 216, 248, 270, 279, 310, 360, 372, 465, 540, 558, 620, 647, 744, 837, 930, 1080, 1116, 1240, 1294, 1395, 1674, 1860, 1941, 2232, 2588, 2790, 3235, 3348, 3720, 3882, 4185, 5176, 5580, 5823, 6470, 6696, 7764, 8370, 9705, 11160, 11646, 12940, 15528, 16740, 17469, 19410, 20057, 23292, 25880, 29115, 33480, 34938, 38820, 40114, 46584, 58230, 60171, 69876, 77640, 80228, 87345, 100285, 116460, 120342, 139752, 160456, 174690, 180513, 200570, 232920, 240684, 300855, 349380, 361026, 401140, 481368, 541539, 601710, 698760, 722052, 802280, 902565, 1083078, 1203420, 1444104, 1805130, 2166156, 2406840, 2707695, 3610260, 4332312, 5415390, 7220520, 10830780, 21661560]

約数ペア:

[(1, 21661560), (2, 10830780), (3, 7220520), (4, 5415390), (5, 4332312), (6, 3610260), (8, 2707695), (9, 2406840), (10, 2166156), (12, 1805130), (15, 1444104), (18, 1203420), (20, 1083078), (24, 902565), (27, 802280), (30, 722052), (31, 698760), (36, 601710), (40, 541539), (45, 481368), (54, 401140), (60, 361026), (62, 349380), (72, 300855), (90, 240684), (93, 232920), (108, 200570), (120, 180513), (124, 174690), (135, 160456), (155, 139752), (180, 120342), (186, 116460), (216, 100285), (248, 87345), (270, 80228), (279, 77640), (310, 69876), (360, 60171), (372, 58230), (465, 46584), (540, 40114), (558, 38820), (620, 34938), (647, 33480), (744, 29115), (837, 25880), (930, 23292), (1080, 20057), (1116, 19410), (1240, 17469), (1294, 16740), (1395, 15528), (1674, 12940), (1860, 11646), (1941, 11160), (2232, 9705), (2588, 8370), (2790, 7764), (3235, 6696), (3348, 6470), (3720, 5823), (3882, 5580), (4185, 5176)]