123451720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{5581}}^1$

素因数の和:5678

約数の個数: 64

約数和(自身を含む): 321523200

約数和(自身を除く): 198071480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 79, 140, 158, 280, 316, 395, 553, 632, 790, 1106, 1580, 2212, 2765, 3160, 4424, 5530, 5581, 11060, 11162, 22120, 22324, 27905, 39067, 44648, 55810, 78134, 111620, 156268, 195335, 223240, 312536, 390670, 440899, 781340, 881798, 1562680, 1763596, 2204495, 3086293, 3527192, 4408990, 6172586, 8817980, 12345172, 15431465, 17635960, 24690344, 30862930, 61725860, 123451720]

約数ペア:

[(1, 123451720), (2, 61725860), (4, 30862930), (5, 24690344), (7, 17635960), (8, 15431465), (10, 12345172), (14, 8817980), (20, 6172586), (28, 4408990), (35, 3527192), (40, 3086293), (56, 2204495), (70, 1763596), (79, 1562680), (140, 881798), (158, 781340), (280, 440899), (316, 390670), (395, 312536), (553, 223240), (632, 195335), (790, 156268), (1106, 111620), (1580, 78134), (2212, 55810), (2765, 44648), (3160, 39067), (4424, 27905), (5530, 22324), (5581, 22120), (11060, 11162)]