19813840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^2\times {\mathrm{857}}^1$

素因数の和:904

約数の個数: 60

約数和(自身を含む): 48993516

約数和(自身を除く): 29179676

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 289, 340, 578, 680, 857, 1156, 1360, 1445, 1714, 2312, 2890, 3428, 4285, 4624, 5780, 6856, 8570, 11560, 13712, 14569, 17140, 23120, 29138, 34280, 58276, 68560, 72845, 116552, 145690, 233104, 247673, 291380, 495346, 582760, 990692, 1165520, 1238365, 1981384, 2476730, 3962768, 4953460, 9906920, 19813840]

約数ペア:

[(1, 19813840), (2, 9906920), (4, 4953460), (5, 3962768), (8, 2476730), (10, 1981384), (16, 1238365), (17, 1165520), (20, 990692), (34, 582760), (40, 495346), (68, 291380), (80, 247673), (85, 233104), (136, 145690), (170, 116552), (272, 72845), (289, 68560), (340, 58276), (578, 34280), (680, 29138), (857, 23120), (1156, 17140), (1360, 14569), (1445, 13712), (1714, 11560), (2312, 8570), (2890, 6856), (3428, 5780), (4285, 4624)]