21949980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{263}}^1$

素因数の和:395

約数の個数: 96

約数和(自身を含む): 67060224

約数和(自身を除く): 45110244

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 107, 130, 156, 195, 214, 260, 263, 321, 390, 428, 526, 535, 642, 780, 789, 1052, 1070, 1284, 1315, 1391, 1578, 1605, 2140, 2630, 2782, 3156, 3210, 3419, 3945, 4173, 5260, 5564, 6420, 6838, 6955, 7890, 8346, 10257, 13676, 13910, 15780, 16692, 17095, 20514, 20865, 27820, 28141, 34190, 41028, 41730, 51285, 56282, 68380, 83460, 84423, 102570, 112564, 140705, 168846, 205140, 281410, 337692, 365833, 422115, 562820, 731666, 844230, 1097499, 1463332, 1688460, 1829165, 2194998, 3658330, 4389996, 5487495, 7316660, 10974990, 21949980]

約数ペア:

[(1, 21949980), (2, 10974990), (3, 7316660), (4, 5487495), (5, 4389996), (6, 3658330), (10, 2194998), (12, 1829165), (13, 1688460), (15, 1463332), (20, 1097499), (26, 844230), (30, 731666), (39, 562820), (52, 422115), (60, 365833), (65, 337692), (78, 281410), (107, 205140), (130, 168846), (156, 140705), (195, 112564), (214, 102570), (260, 84423), (263, 83460), (321, 68380), (390, 56282), (428, 51285), (526, 41730), (535, 41028), (642, 34190), (780, 28141), (789, 27820), (1052, 20865), (1070, 20514), (1284, 17095), (1315, 16692), (1391, 15780), (1578, 13910), (1605, 13676), (2140, 10257), (2630, 8346), (2782, 7890), (3156, 6955), (3210, 6838), (3419, 6420), (3945, 5564), (4173, 5260)]