640295760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{205223}}^1$

素因数の和:205252

約数の個数: 80

約数和(自身を含む): 2137613184

約数和(自身を除く): 1497317424

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 205223, 410446, 615669, 820892, 1026115, 1231338, 1641784, 2052230, 2462676, 2667899, 3078345, 3283568, 4104460, 4925352, 5335798, 6156690, 8003697, 8208920, 9850704, 10671596, 12313380, 13339495, 16007394, 16417840, 21343192, 24626760, 26678990, 32014788, 40018485, 42686384, 49253520, 53357980, 64029576, 80036970, 106715960, 128059152, 160073940, 213431920, 320147880, 640295760]

約数ペア:

[(1, 640295760), (2, 320147880), (3, 213431920), (4, 160073940), (5, 128059152), (6, 106715960), (8, 80036970), (10, 64029576), (12, 53357980), (13, 49253520), (15, 42686384), (16, 40018485), (20, 32014788), (24, 26678990), (26, 24626760), (30, 21343192), (39, 16417840), (40, 16007394), (48, 13339495), (52, 12313380), (60, 10671596), (65, 9850704), (78, 8208920), (80, 8003697), (104, 6156690), (120, 5335798), (130, 4925352), (156, 4104460), (195, 3283568), (208, 3078345), (240, 2667899), (260, 2462676), (312, 2052230), (390, 1641784), (520, 1231338), (624, 1026115), (780, 820892), (1040, 615669), (1560, 410446), (3120, 205223)]