21815430

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:222

約数の個数: 128

約数和(自身を含む): 65995776

約数和(自身を除く): 44180346

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 21, 26, 30, 35, 39, 42, 61, 65, 70, 78, 91, 105, 122, 130, 131, 182, 183, 195, 210, 262, 273, 305, 366, 390, 393, 427, 455, 546, 610, 655, 786, 793, 854, 910, 915, 917, 1281, 1310, 1365, 1586, 1703, 1830, 1834, 1965, 2135, 2379, 2562, 2730, 2751, 3406, 3930, 3965, 4270, 4585, 4758, 5109, 5502, 5551, 6405, 7930, 7991, 8515, 9170, 10218, 11102, 11895, 11921, 12810, 13755, 15982, 16653, 17030, 23790, 23842, 23973, 25545, 27510, 27755, 33306, 35763, 39955, 47946, 51090, 55510, 55937, 59605, 71526, 79910, 83265, 103883, 111874, 119210, 119865, 166530, 167811, 178815, 207766, 239730, 279685, 311649, 335622, 357630, 519415, 559370, 623298, 727181, 839055, 1038830, 1454362, 1558245, 1678110, 2181543, 3116490, 3635905, 4363086, 7271810, 10907715, 21815430]

約数ペア:

[(1, 21815430), (2, 10907715), (3, 7271810), (5, 4363086), (6, 3635905), (7, 3116490), (10, 2181543), (13, 1678110), (14, 1558245), (15, 1454362), (21, 1038830), (26, 839055), (30, 727181), (35, 623298), (39, 559370), (42, 519415), (61, 357630), (65, 335622), (70, 311649), (78, 279685), (91, 239730), (105, 207766), (122, 178815), (130, 167811), (131, 166530), (182, 119865), (183, 119210), (195, 111874), (210, 103883), (262, 83265), (273, 79910), (305, 71526), (366, 59605), (390, 55937), (393, 55510), (427, 51090), (455, 47946), (546, 39955), (610, 35763), (655, 33306), (786, 27755), (793, 27510), (854, 25545), (910, 23973), (915, 23842), (917, 23790), (1281, 17030), (1310, 16653), (1365, 15982), (1586, 13755), (1703, 12810), (1830, 11921), (1834, 11895), (1965, 11102), (2135, 10218), (2379, 9170), (2562, 8515), (2730, 7991), (2751, 7930), (3406, 6405), (3930, 5551), (3965, 5502), (4270, 5109), (4585, 4758)]