20100100

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 46872000

約数和(自身を除く): 26771900

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 71, 76, 95, 100, 142, 149, 190, 284, 298, 355, 380, 475, 596, 710, 745, 950, 1349, 1420, 1490, 1775, 1900, 2698, 2831, 2980, 3550, 3725, 5396, 5662, 6745, 7100, 7450, 10579, 11324, 13490, 14155, 14900, 21158, 26980, 28310, 33725, 42316, 52895, 56620, 67450, 70775, 105790, 134900, 141550, 201001, 211580, 264475, 283100, 402002, 528950, 804004, 1005005, 1057900, 2010010, 4020020, 5025025, 10050050, 20100100]

約数ペア:

[(1, 20100100), (2, 10050050), (4, 5025025), (5, 4020020), (10, 2010010), (19, 1057900), (20, 1005005), (25, 804004), (38, 528950), (50, 402002), (71, 283100), (76, 264475), (95, 211580), (100, 201001), (142, 141550), (149, 134900), (190, 105790), (284, 70775), (298, 67450), (355, 56620), (380, 52895), (475, 42316), (596, 33725), (710, 28310), (745, 26980), (950, 21158), (1349, 14900), (1420, 14155), (1490, 13490), (1775, 11324), (1900, 10579), (2698, 7450), (2831, 7100), (2980, 6745), (3550, 5662), (3725, 5396)]