12812440

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:220

約数の個数: 64

約数和(自身を含む): 30132000

約数和(自身を除く): 17319560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 61, 89, 118, 122, 178, 236, 244, 295, 305, 356, 445, 472, 488, 590, 610, 712, 890, 1180, 1220, 1780, 2360, 2440, 3560, 3599, 5251, 5429, 7198, 10502, 10858, 14396, 17995, 21004, 21716, 26255, 27145, 28792, 35990, 42008, 43432, 52510, 54290, 71980, 105020, 108580, 143960, 210040, 217160, 320311, 640622, 1281244, 1601555, 2562488, 3203110, 6406220, 12812440]

約数ペア:

[(1, 12812440), (2, 6406220), (4, 3203110), (5, 2562488), (8, 1601555), (10, 1281244), (20, 640622), (40, 320311), (59, 217160), (61, 210040), (89, 143960), (118, 108580), (122, 105020), (178, 71980), (236, 54290), (244, 52510), (295, 43432), (305, 42008), (356, 35990), (445, 28792), (472, 27145), (488, 26255), (590, 21716), (610, 21004), (712, 17995), (890, 14396), (1180, 10858), (1220, 10502), (1780, 7198), (2360, 5429), (2440, 5251), (3560, 3599)]