15978950

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:130

約数の個数: 72

約数和(自身を含む): 33765696

約数和(自身を除く): 17786746

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 50, 61, 62, 65, 122, 130, 155, 169, 305, 310, 325, 338, 403, 610, 650, 775, 793, 806, 845, 1525, 1550, 1586, 1690, 1891, 2015, 3050, 3782, 3965, 4030, 4225, 5239, 7930, 8450, 9455, 10075, 10309, 10478, 18910, 19825, 20150, 20618, 24583, 26195, 39650, 47275, 49166, 51545, 52390, 94550, 103090, 122915, 130975, 245830, 257725, 261950, 319579, 515450, 614575, 639158, 1229150, 1597895, 3195790, 7989475, 15978950]

約数ペア:

[(1, 15978950), (2, 7989475), (5, 3195790), (10, 1597895), (13, 1229150), (25, 639158), (26, 614575), (31, 515450), (50, 319579), (61, 261950), (62, 257725), (65, 245830), (122, 130975), (130, 122915), (155, 103090), (169, 94550), (305, 52390), (310, 51545), (325, 49166), (338, 47275), (403, 39650), (610, 26195), (650, 24583), (775, 20618), (793, 20150), (806, 19825), (845, 18910), (1525, 10478), (1550, 10309), (1586, 10075), (1690, 9455), (1891, 8450), (2015, 7930), (3050, 5239), (3782, 4225), (3965, 4030)]