18798980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{811}}^1$

素因数の和:900

約数の個数: 48

約数和(自身を含む): 42288960

約数和(自身を除く): 23489980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 61, 76, 95, 122, 190, 244, 305, 380, 610, 811, 1159, 1220, 1622, 2318, 3244, 4055, 4636, 5795, 8110, 11590, 15409, 16220, 23180, 30818, 49471, 61636, 77045, 98942, 154090, 197884, 247355, 308180, 494710, 939949, 989420, 1879898, 3759796, 4699745, 9399490, 18798980]

約数ペア:

[(1, 18798980), (2, 9399490), (4, 4699745), (5, 3759796), (10, 1879898), (19, 989420), (20, 939949), (38, 494710), (61, 308180), (76, 247355), (95, 197884), (122, 154090), (190, 98942), (244, 77045), (305, 61636), (380, 49471), (610, 30818), (811, 23180), (1159, 16220), (1220, 15409), (1622, 11590), (2318, 8110), (3244, 5795), (4055, 4636)]