19563920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:304

約数の個数: 80

約数和(自身を含む): 48895680

約数和(自身を除く): 29331760

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 61, 76, 80, 95, 122, 152, 190, 211, 244, 304, 305, 380, 422, 488, 610, 760, 844, 976, 1055, 1159, 1220, 1520, 1688, 2110, 2318, 2440, 3376, 4009, 4220, 4636, 4880, 5795, 8018, 8440, 9272, 11590, 12871, 16036, 16880, 18544, 20045, 23180, 25742, 32072, 40090, 46360, 51484, 64144, 64355, 80180, 92720, 102968, 128710, 160360, 205936, 244549, 257420, 320720, 489098, 514840, 978196, 1029680, 1222745, 1956392, 2445490, 3912784, 4890980, 9781960, 19563920]

約数ペア:

[(1, 19563920), (2, 9781960), (4, 4890980), (5, 3912784), (8, 2445490), (10, 1956392), (16, 1222745), (19, 1029680), (20, 978196), (38, 514840), (40, 489098), (61, 320720), (76, 257420), (80, 244549), (95, 205936), (122, 160360), (152, 128710), (190, 102968), (211, 92720), (244, 80180), (304, 64355), (305, 64144), (380, 51484), (422, 46360), (488, 40090), (610, 32072), (760, 25742), (844, 23180), (976, 20045), (1055, 18544), (1159, 16880), (1220, 16036), (1520, 12871), (1688, 11590), (2110, 9272), (2318, 8440), (2440, 8018), (3376, 5795), (4009, 4880), (4220, 4636)]