9781960

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:302

約数の個数: 64

約数和(自身を含む): 23659200

約数和(自身を除く): 13877240

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 61, 76, 95, 122, 152, 190, 211, 244, 305, 380, 422, 488, 610, 760, 844, 1055, 1159, 1220, 1688, 2110, 2318, 2440, 4009, 4220, 4636, 5795, 8018, 8440, 9272, 11590, 12871, 16036, 20045, 23180, 25742, 32072, 40090, 46360, 51484, 64355, 80180, 102968, 128710, 160360, 244549, 257420, 489098, 514840, 978196, 1222745, 1956392, 2445490, 4890980, 9781960]

約数ペア:

[(1, 9781960), (2, 4890980), (4, 2445490), (5, 1956392), (8, 1222745), (10, 978196), (19, 514840), (20, 489098), (38, 257420), (40, 244549), (61, 160360), (76, 128710), (95, 102968), (122, 80180), (152, 64355), (190, 51484), (211, 46360), (244, 40090), (305, 32072), (380, 25742), (422, 23180), (488, 20045), (610, 16036), (760, 12871), (844, 11590), (1055, 9272), (1159, 8440), (1220, 8018), (1688, 5795), (2110, 4636), (2318, 4220), (2440, 4009)]