21152802800

素因数分解:

$2^4\times 5^2\times {\mathrm{71}}^1\times {\mathrm{744817}}^1$

素因数の和:744906

約数の個数: 60

約数和(自身を含む): 51535447056

約数和(自身を除く): 30382644256

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 71, 80, 100, 142, 200, 284, 355, 400, 568, 710, 1136, 1420, 1775, 2840, 3550, 5680, 7100, 14200, 28400, 744817, 1489634, 2979268, 3724085, 5958536, 7448170, 11917072, 14896340, 18620425, 29792680, 37240850, 52882007, 59585360, 74481700, 105764014, 148963400, 211528028, 264410035, 297926800, 423056056, 528820070, 846112112, 1057640140, 1322050175, 2115280280, 2644100350, 4230560560, 5288200700, 10576401400, 21152802800]

約数ペア:

[(1, 21152802800), (2, 10576401400), (4, 5288200700), (5, 4230560560), (8, 2644100350), (10, 2115280280), (16, 1322050175), (20, 1057640140), (25, 846112112), (40, 528820070), (50, 423056056), (71, 297926800), (80, 264410035), (100, 211528028), (142, 148963400), (200, 105764014), (284, 74481700), (355, 59585360), (400, 52882007), (568, 37240850), (710, 29792680), (1136, 18620425), (1420, 14896340), (1775, 11917072), (2840, 7448170), (3550, 5958536), (5680, 3724085), (7100, 2979268), (14200, 1489634), (28400, 744817)]