20671456

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:156

約数の個数: 96

約数和(自身を含む): 48263040

約数和(自身を除く): 27591584

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 32, 34, 37, 52, 68, 74, 79, 104, 136, 148, 158, 208, 221, 272, 296, 316, 416, 442, 481, 544, 592, 629, 632, 884, 962, 1027, 1184, 1258, 1264, 1343, 1768, 1924, 2054, 2516, 2528, 2686, 2923, 3536, 3848, 4108, 5032, 5372, 5846, 7072, 7696, 8177, 8216, 10064, 10744, 11692, 15392, 16354, 16432, 17459, 20128, 21488, 23384, 32708, 32864, 34918, 37999, 42976, 46768, 49691, 65416, 69836, 75998, 93536, 99382, 130832, 139672, 151996, 198764, 261664, 279344, 303992, 397528, 558688, 607984, 645983, 795056, 1215968, 1291966, 1590112, 2583932, 5167864, 10335728, 20671456]

約数ペア:

[(1, 20671456), (2, 10335728), (4, 5167864), (8, 2583932), (13, 1590112), (16, 1291966), (17, 1215968), (26, 795056), (32, 645983), (34, 607984), (37, 558688), (52, 397528), (68, 303992), (74, 279344), (79, 261664), (104, 198764), (136, 151996), (148, 139672), (158, 130832), (208, 99382), (221, 93536), (272, 75998), (296, 69836), (316, 65416), (416, 49691), (442, 46768), (481, 42976), (544, 37999), (592, 34918), (629, 32864), (632, 32708), (884, 23384), (962, 21488), (1027, 20128), (1184, 17459), (1258, 16432), (1264, 16354), (1343, 15392), (1768, 11692), (1924, 10744), (2054, 10064), (2516, 8216), (2528, 8177), (2686, 7696), (2923, 7072), (3536, 5846), (3848, 5372), (4108, 5032)]