21085890

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:168

約数の個数: 128

約数和(自身を含む): 61931520

約数和(自身を除く): 40845630

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 31, 35, 41, 42, 62, 70, 79, 82, 93, 105, 123, 155, 158, 186, 205, 210, 217, 237, 246, 287, 310, 395, 410, 434, 465, 474, 553, 574, 615, 651, 790, 861, 930, 1085, 1106, 1185, 1230, 1271, 1302, 1435, 1659, 1722, 2170, 2370, 2449, 2542, 2765, 2870, 3239, 3255, 3318, 3813, 4305, 4898, 5530, 6355, 6478, 6510, 7347, 7626, 8295, 8610, 8897, 9717, 12245, 12710, 14694, 16195, 16590, 17143, 17794, 19065, 19434, 22673, 24490, 26691, 32390, 34286, 36735, 38130, 44485, 45346, 48585, 51429, 53382, 68019, 73470, 85715, 88970, 97170, 100409, 102858, 113365, 133455, 136038, 171430, 200818, 226730, 257145, 266910, 301227, 340095, 502045, 514290, 602454, 680190, 702863, 1004090, 1405726, 1506135, 2108589, 3012270, 3514315, 4217178, 7028630, 10542945, 21085890]

約数ペア:

[(1, 21085890), (2, 10542945), (3, 7028630), (5, 4217178), (6, 3514315), (7, 3012270), (10, 2108589), (14, 1506135), (15, 1405726), (21, 1004090), (30, 702863), (31, 680190), (35, 602454), (41, 514290), (42, 502045), (62, 340095), (70, 301227), (79, 266910), (82, 257145), (93, 226730), (105, 200818), (123, 171430), (155, 136038), (158, 133455), (186, 113365), (205, 102858), (210, 100409), (217, 97170), (237, 88970), (246, 85715), (287, 73470), (310, 68019), (395, 53382), (410, 51429), (434, 48585), (465, 45346), (474, 44485), (553, 38130), (574, 36735), (615, 34286), (651, 32390), (790, 26691), (861, 24490), (930, 22673), (1085, 19434), (1106, 19065), (1185, 17794), (1230, 17143), (1271, 16590), (1302, 16195), (1435, 14694), (1659, 12710), (1722, 12245), (2170, 9717), (2370, 8897), (2449, 8610), (2542, 8295), (2765, 7626), (2870, 7347), (3239, 6510), (3255, 6478), (3318, 6355), (3813, 5530), (4305, 4898)]