80172980

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1\times {\mathrm{617}}^1$

素因数の和:788

約数の個数: 48

約数和(自身を含む): 172866960

約数和(自身を除く): 92693980

約数列:

[1, 2, 4, 5, 10, 20, 73, 89, 146, 178, 292, 356, 365, 445, 617, 730, 890, 1234, 1460, 1780, 2468, 3085, 6170, 6497, 12340, 12994, 25988, 32485, 45041, 54913, 64970, 90082, 109826, 129940, 180164, 219652, 225205, 274565, 450410, 549130, 900820, 1098260, 4008649, 8017298, 16034596, 20043245, 40086490, 80172980]

約数ペア:

[(1, 80172980), (2, 40086490), (4, 20043245), (5, 16034596), (10, 8017298), (20, 4008649), (73, 1098260), (89, 900820), (146, 549130), (178, 450410), (292, 274565), (356, 225205), (365, 219652), (445, 180164), (617, 129940), (730, 109826), (890, 90082), (1234, 64970), (1460, 54913), (1780, 45041), (2468, 32485), (3085, 25988), (6170, 12994), (6497, 12340)]