19897750

素因数分解:

$2^1\times 5^3\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:166

約数の個数: 64

約数和(自身を含む): 40435200

約数和(自身を除く): 20537450

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 59, 71, 95, 118, 125, 142, 190, 250, 295, 355, 475, 590, 710, 950, 1121, 1349, 1475, 1775, 2242, 2375, 2698, 2950, 3550, 4189, 4750, 5605, 6745, 7375, 8378, 8875, 11210, 13490, 14750, 17750, 20945, 28025, 33725, 41890, 56050, 67450, 79591, 104725, 140125, 159182, 168625, 209450, 280250, 337250, 397955, 523625, 795910, 1047250, 1989775, 3979550, 9948875, 19897750]

約数ペア:

[(1, 19897750), (2, 9948875), (5, 3979550), (10, 1989775), (19, 1047250), (25, 795910), (38, 523625), (50, 397955), (59, 337250), (71, 280250), (95, 209450), (118, 168625), (125, 159182), (142, 140125), (190, 104725), (250, 79591), (295, 67450), (355, 56050), (475, 41890), (590, 33725), (710, 28025), (950, 20945), (1121, 17750), (1349, 14750), (1475, 13490), (1775, 11210), (2242, 8875), (2375, 8378), (2698, 7375), (2950, 6745), (3550, 5605), (4189, 4750)]