19854880

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4003}}^1$

素因数の和:4049

約数の個数: 48

約数和(自身を含む): 48432384

約数和(自身を除く): 28577504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4003, 4960, 8006, 16012, 20015, 32024, 40030, 64048, 80060, 124093, 128096, 160120, 248186, 320240, 496372, 620465, 640480, 992744, 1240930, 1985488, 2481860, 3970976, 4963720, 9927440, 19854880]

約数ペア:

[(1, 19854880), (2, 9927440), (4, 4963720), (5, 3970976), (8, 2481860), (10, 1985488), (16, 1240930), (20, 992744), (31, 640480), (32, 620465), (40, 496372), (62, 320240), (80, 248186), (124, 160120), (155, 128096), (160, 124093), (248, 80060), (310, 64048), (496, 40030), (620, 32024), (992, 20015), (1240, 16012), (2480, 8006), (4003, 4960)]