19710625

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:139

約数の個数: 40

約数和(自身を含む): 27891072

約数和(自身を除く): 8180447

約数列:

[1, 5, 11, 25, 47, 55, 61, 125, 235, 275, 305, 517, 625, 671, 1175, 1375, 1525, 2585, 2867, 3355, 5875, 6875, 7625, 12925, 14335, 16775, 29375, 31537, 38125, 64625, 71675, 83875, 157685, 323125, 358375, 419375, 788425, 1791875, 3942125, 19710625]

約数ペア:

[(1, 19710625), (5, 3942125), (11, 1791875), (25, 788425), (47, 419375), (55, 358375), (61, 323125), (125, 157685), (235, 83875), (275, 71675), (305, 64625), (517, 38125), (625, 31537), (671, 29375), (1175, 16775), (1375, 14335), (1525, 12925), (2585, 7625), (2867, 6875), (3355, 5875)]