261820120

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^2\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:293

約数の個数: 96

約数和(自身を含む): 627747120

約数和(自身を除く): 365927000

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 43, 58, 86, 116, 145, 172, 181, 215, 232, 290, 344, 362, 430, 580, 724, 841, 860, 905, 1160, 1247, 1448, 1682, 1720, 1810, 2494, 3364, 3620, 4205, 4988, 5249, 6235, 6728, 7240, 7783, 8410, 9976, 10498, 12470, 15566, 16820, 20996, 24940, 26245, 31132, 33640, 36163, 38915, 41992, 49880, 52490, 62264, 72326, 77830, 104980, 144652, 152221, 155660, 180815, 209960, 225707, 289304, 304442, 311320, 361630, 451414, 608884, 723260, 761105, 902828, 1128535, 1217768, 1446520, 1522210, 1805656, 2257070, 3044420, 4514140, 6088840, 6545503, 9028280, 13091006, 26182012, 32727515, 52364024, 65455030, 130910060, 261820120]

約数ペア:

[(1, 261820120), (2, 130910060), (4, 65455030), (5, 52364024), (8, 32727515), (10, 26182012), (20, 13091006), (29, 9028280), (40, 6545503), (43, 6088840), (58, 4514140), (86, 3044420), (116, 2257070), (145, 1805656), (172, 1522210), (181, 1446520), (215, 1217768), (232, 1128535), (290, 902828), (344, 761105), (362, 723260), (430, 608884), (580, 451414), (724, 361630), (841, 311320), (860, 304442), (905, 289304), (1160, 225707), (1247, 209960), (1448, 180815), (1682, 155660), (1720, 152221), (1810, 144652), (2494, 104980), (3364, 77830), (3620, 72326), (4205, 62264), (4988, 52490), (5249, 49880), (6235, 41992), (6728, 38915), (7240, 36163), (7783, 33640), (8410, 31132), (9976, 26245), (10498, 24940), (12470, 20996), (15566, 16820)]