25121020

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{349}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 54684000

約数和(自身を除く): 29562980

約数列:

[1, 2, 4, 5, 10, 20, 59, 61, 118, 122, 236, 244, 295, 305, 349, 590, 610, 698, 1180, 1220, 1396, 1745, 3490, 3599, 6980, 7198, 14396, 17995, 20591, 21289, 35990, 41182, 42578, 71980, 82364, 85156, 102955, 106445, 205910, 212890, 411820, 425780, 1256051, 2512102, 5024204, 6280255, 12560510, 25121020]

約数ペア:

[(1, 25121020), (2, 12560510), (4, 6280255), (5, 5024204), (10, 2512102), (20, 1256051), (59, 425780), (61, 411820), (118, 212890), (122, 205910), (236, 106445), (244, 102955), (295, 85156), (305, 82364), (349, 71980), (590, 42578), (610, 41182), (698, 35990), (1180, 21289), (1220, 20591), (1396, 17995), (1745, 14396), (3490, 7198), (3599, 6980)]