181220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1$

素因数の和:80

約数の個数: 48

約数和(自身を含む): 444528

約数和(自身を除く): 263308

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 41, 52, 65, 68, 82, 85, 130, 164, 170, 205, 221, 260, 340, 410, 442, 533, 697, 820, 884, 1066, 1105, 1394, 2132, 2210, 2665, 2788, 3485, 4420, 5330, 6970, 9061, 10660, 13940, 18122, 36244, 45305, 90610, 181220]

約数ペア:

[(1, 181220), (2, 90610), (4, 45305), (5, 36244), (10, 18122), (13, 13940), (17, 10660), (20, 9061), (26, 6970), (34, 5330), (41, 4420), (52, 3485), (65, 2788), (68, 2665), (82, 2210), (85, 2132), (130, 1394), (164, 1105), (170, 1066), (205, 884), (221, 820), (260, 697), (340, 533), (410, 442)]