21559980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{211}}^1$

素因数の和:367

約数の個数: 96

約数和(自身を含む): 65818368

約数和(自身を除く): 44258388

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 131, 156, 195, 211, 260, 262, 390, 393, 422, 524, 633, 655, 780, 786, 844, 1055, 1266, 1310, 1572, 1703, 1965, 2110, 2532, 2620, 2743, 3165, 3406, 3930, 4220, 5109, 5486, 6330, 6812, 7860, 8229, 8515, 10218, 10972, 12660, 13715, 16458, 17030, 20436, 25545, 27430, 27641, 32916, 34060, 41145, 51090, 54860, 55282, 82290, 82923, 102180, 110564, 138205, 164580, 165846, 276410, 331692, 359333, 414615, 552820, 718666, 829230, 1077999, 1437332, 1658460, 1796665, 2155998, 3593330, 4311996, 5389995, 7186660, 10779990, 21559980]

約数ペア:

[(1, 21559980), (2, 10779990), (3, 7186660), (4, 5389995), (5, 4311996), (6, 3593330), (10, 2155998), (12, 1796665), (13, 1658460), (15, 1437332), (20, 1077999), (26, 829230), (30, 718666), (39, 552820), (52, 414615), (60, 359333), (65, 331692), (78, 276410), (130, 165846), (131, 164580), (156, 138205), (195, 110564), (211, 102180), (260, 82923), (262, 82290), (390, 55282), (393, 54860), (422, 51090), (524, 41145), (633, 34060), (655, 32916), (780, 27641), (786, 27430), (844, 25545), (1055, 20436), (1266, 17030), (1310, 16458), (1572, 13715), (1703, 12660), (1965, 10972), (2110, 10218), (2532, 8515), (2620, 8229), (2743, 7860), (3165, 6812), (3406, 6330), (3930, 5486), (4220, 5109)]