21086475280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{654047}}^1$

素因数の和:654104

約数の個数: 80

約数和(自身を含む): 54500511744

約数和(自身を除く): 33414036464

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 1040, 1240, 1612, 2015, 2480, 3224, 4030, 6448, 8060, 16120, 32240, 654047, 1308094, 2616188, 3270235, 5232376, 6540470, 8502611, 10464752, 13080940, 17005222, 20275457, 26161880, 34010444, 40550914, 42513055, 52323760, 68020888, 81101828, 85026110, 101377285, 136041776, 162203656, 170052220, 202754570, 263580941, 324407312, 340104440, 405509140, 527161882, 680208880, 811018280, 1054323764, 1317904705, 1622036560, 2108647528, 2635809410, 4217295056, 5271618820, 10543237640, 21086475280]

約数ペア:

[(1, 21086475280), (2, 10543237640), (4, 5271618820), (5, 4217295056), (8, 2635809410), (10, 2108647528), (13, 1622036560), (16, 1317904705), (20, 1054323764), (26, 811018280), (31, 680208880), (40, 527161882), (52, 405509140), (62, 340104440), (65, 324407312), (80, 263580941), (104, 202754570), (124, 170052220), (130, 162203656), (155, 136041776), (208, 101377285), (248, 85026110), (260, 81101828), (310, 68020888), (403, 52323760), (496, 42513055), (520, 40550914), (620, 34010444), (806, 26161880), (1040, 20275457), (1240, 17005222), (1612, 13080940), (2015, 10464752), (2480, 8502611), (3224, 6540470), (4030, 5232376), (6448, 3270235), (8060, 2616188), (16120, 1308094), (32240, 654047)]