21680748120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{521}}^1\times {\mathrm{541}}^1\times {\mathrm{641}}^1$

素因数の和:1717

約数の個数: 128

約数和(自身を含む): 65389394880

約数和(自身を除く): 43708646760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 521, 541, 641, 1042, 1082, 1282, 1563, 1623, 1923, 2084, 2164, 2564, 2605, 2705, 3126, 3205, 3246, 3846, 4168, 4328, 5128, 5210, 5410, 6252, 6410, 6492, 7692, 7815, 8115, 9615, 10420, 10820, 12504, 12820, 12984, 15384, 15630, 16230, 19230, 20840, 21640, 25640, 31260, 32460, 38460, 62520, 64920, 76920, 281861, 333961, 346781, 563722, 667922, 693562, 845583, 1001883, 1040343, 1127444, 1335844, 1387124, 1409305, 1669805, 1691166, 1733905, 2003766, 2080686, 2254888, 2671688, 2774248, 2818610, 3339610, 3382332, 3467810, 4007532, 4161372, 4227915, 5009415, 5201715, 5637220, 6679220, 6764664, 6935620, 8015064, 8322744, 8455830, 10018830, 10403430, 11274440, 13358440, 13871240, 16911660, 20037660, 20806860, 33823320, 40075320, 41613720, 180672901, 361345802, 542018703, 722691604, 903364505, 1084037406, 1445383208, 1806729010, 2168074812, 2710093515, 3613458020, 4336149624, 5420187030, 7226916040, 10840374060, 21680748120]

約数ペア:

[(1, 21680748120), (2, 10840374060), (3, 7226916040), (4, 5420187030), (5, 4336149624), (6, 3613458020), (8, 2710093515), (10, 2168074812), (12, 1806729010), (15, 1445383208), (20, 1084037406), (24, 903364505), (30, 722691604), (40, 542018703), (60, 361345802), (120, 180672901), (521, 41613720), (541, 40075320), (641, 33823320), (1042, 20806860), (1082, 20037660), (1282, 16911660), (1563, 13871240), (1623, 13358440), (1923, 11274440), (2084, 10403430), (2164, 10018830), (2564, 8455830), (2605, 8322744), (2705, 8015064), (3126, 6935620), (3205, 6764664), (3246, 6679220), (3846, 5637220), (4168, 5201715), (4328, 5009415), (5128, 4227915), (5210, 4161372), (5410, 4007532), (6252, 3467810), (6410, 3382332), (6492, 3339610), (7692, 2818610), (7815, 2774248), (8115, 2671688), (9615, 2254888), (10420, 2080686), (10820, 2003766), (12504, 1733905), (12820, 1691166), (12984, 1669805), (15384, 1409305), (15630, 1387124), (16230, 1335844), (19230, 1127444), (20840, 1040343), (21640, 1001883), (25640, 845583), (31260, 693562), (32460, 667922), (38460, 563722), (62520, 346781), (64920, 333961), (76920, 281861)]