20212960

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:204

約数の個数: 96

約数和(自身を含む): 51559200

約数和(自身を除く): 31346240

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 61, 76, 80, 95, 109, 122, 152, 160, 190, 218, 244, 304, 305, 380, 436, 488, 545, 608, 610, 760, 872, 976, 1090, 1159, 1220, 1520, 1744, 1952, 2071, 2180, 2318, 2440, 3040, 3488, 4142, 4360, 4636, 4880, 5795, 6649, 8284, 8720, 9272, 9760, 10355, 11590, 13298, 16568, 17440, 18544, 20710, 23180, 26596, 33136, 33245, 37088, 41420, 46360, 53192, 66272, 66490, 82840, 92720, 106384, 126331, 132980, 165680, 185440, 212768, 252662, 265960, 331360, 505324, 531920, 631655, 1010648, 1063840, 1263310, 2021296, 2526620, 4042592, 5053240, 10106480, 20212960]

約数ペア:

[(1, 20212960), (2, 10106480), (4, 5053240), (5, 4042592), (8, 2526620), (10, 2021296), (16, 1263310), (19, 1063840), (20, 1010648), (32, 631655), (38, 531920), (40, 505324), (61, 331360), (76, 265960), (80, 252662), (95, 212768), (109, 185440), (122, 165680), (152, 132980), (160, 126331), (190, 106384), (218, 92720), (244, 82840), (304, 66490), (305, 66272), (380, 53192), (436, 46360), (488, 41420), (545, 37088), (608, 33245), (610, 33136), (760, 26596), (872, 23180), (976, 20710), (1090, 18544), (1159, 17440), (1220, 16568), (1520, 13298), (1744, 11590), (1952, 10355), (2071, 9760), (2180, 9272), (2318, 8720), (2440, 8284), (3040, 6649), (3488, 5795), (4142, 4880), (4360, 4636)]