20819900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{331}}^1$

素因数の和:399

約数の個数: 72

約数和(自身を含む): 49278096

約数和(自身を除く): 28458196

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 37, 50, 68, 74, 85, 100, 148, 170, 185, 331, 340, 370, 425, 629, 662, 740, 850, 925, 1258, 1324, 1655, 1700, 1850, 2516, 3145, 3310, 3700, 5627, 6290, 6620, 8275, 11254, 12247, 12580, 15725, 16550, 22508, 24494, 28135, 31450, 33100, 48988, 56270, 61235, 62900, 112540, 122470, 140675, 208199, 244940, 281350, 306175, 416398, 562700, 612350, 832796, 1040995, 1224700, 2081990, 4163980, 5204975, 10409950, 20819900]

約数ペア:

[(1, 20819900), (2, 10409950), (4, 5204975), (5, 4163980), (10, 2081990), (17, 1224700), (20, 1040995), (25, 832796), (34, 612350), (37, 562700), (50, 416398), (68, 306175), (74, 281350), (85, 244940), (100, 208199), (148, 140675), (170, 122470), (185, 112540), (331, 62900), (340, 61235), (370, 56270), (425, 48988), (629, 33100), (662, 31450), (740, 28135), (850, 24494), (925, 22508), (1258, 16550), (1324, 15725), (1655, 12580), (1700, 12247), (1850, 11254), (2516, 8275), (3145, 6620), (3310, 6290), (3700, 5627)]