21678111

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1$

素因数の和:222

約数の個数: 80

約数和(自身を含む): 42444864

約数和(自身を除く): 20766753

約数列:

[1, 3, 7, 9, 13, 17, 21, 27, 39, 51, 63, 81, 91, 117, 119, 153, 173, 189, 221, 273, 351, 357, 459, 519, 567, 663, 819, 1053, 1071, 1211, 1377, 1547, 1557, 1989, 2249, 2457, 2941, 3213, 3633, 4641, 4671, 5967, 6747, 7371, 8823, 9639, 10899, 13923, 14013, 15743, 17901, 20241, 20587, 26469, 32697, 38233, 41769, 47229, 60723, 61761, 79407, 98091, 114699, 125307, 141687, 182169, 185283, 238221, 267631, 344097, 425061, 555849, 802893, 1032291, 1275183, 1667547, 2408679, 3096873, 7226037, 21678111]

約数ペア:

[(1, 21678111), (3, 7226037), (7, 3096873), (9, 2408679), (13, 1667547), (17, 1275183), (21, 1032291), (27, 802893), (39, 555849), (51, 425061), (63, 344097), (81, 267631), (91, 238221), (117, 185283), (119, 182169), (153, 141687), (173, 125307), (189, 114699), (221, 98091), (273, 79407), (351, 61761), (357, 60723), (459, 47229), (519, 41769), (567, 38233), (663, 32697), (819, 26469), (1053, 20587), (1071, 20241), (1211, 17901), (1377, 15743), (1547, 14013), (1557, 13923), (1989, 10899), (2249, 9639), (2457, 8823), (2941, 7371), (3213, 6747), (3633, 5967), (4641, 4671)]