18503380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{239}}^1$

素因数の和:341

約数の個数: 72

約数和(自身を含む): 45964800

約数和(自身を除く): 27461420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 79, 98, 140, 158, 196, 239, 245, 316, 395, 478, 490, 553, 790, 956, 980, 1106, 1195, 1580, 1673, 2212, 2390, 2765, 3346, 3871, 4780, 5530, 6692, 7742, 8365, 11060, 11711, 15484, 16730, 18881, 19355, 23422, 33460, 37762, 38710, 46844, 58555, 75524, 77420, 94405, 117110, 132167, 188810, 234220, 264334, 377620, 528668, 660835, 925169, 1321670, 1850338, 2643340, 3700676, 4625845, 9251690, 18503380]

約数ペア:

[(1, 18503380), (2, 9251690), (4, 4625845), (5, 3700676), (7, 2643340), (10, 1850338), (14, 1321670), (20, 925169), (28, 660835), (35, 528668), (49, 377620), (70, 264334), (79, 234220), (98, 188810), (140, 132167), (158, 117110), (196, 94405), (239, 77420), (245, 75524), (316, 58555), (395, 46844), (478, 38710), (490, 37762), (553, 33460), (790, 23422), (956, 19355), (980, 18881), (1106, 16730), (1195, 15484), (1580, 11711), (1673, 11060), (2212, 8365), (2390, 7742), (2765, 6692), (3346, 5530), (3871, 4780)]