21721960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1129}}^1$

素因数の和:1190

約数の個数: 64

約数和(自身を含む): 54104400

約数和(自身を除く): 32382440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 37, 40, 52, 65, 74, 104, 130, 148, 185, 260, 296, 370, 481, 520, 740, 962, 1129, 1480, 1924, 2258, 2405, 3848, 4516, 4810, 5645, 9032, 9620, 11290, 14677, 19240, 22580, 29354, 41773, 45160, 58708, 73385, 83546, 117416, 146770, 167092, 208865, 293540, 334184, 417730, 543049, 587080, 835460, 1086098, 1670920, 2172196, 2715245, 4344392, 5430490, 10860980, 21721960]

約数ペア:

[(1, 21721960), (2, 10860980), (4, 5430490), (5, 4344392), (8, 2715245), (10, 2172196), (13, 1670920), (20, 1086098), (26, 835460), (37, 587080), (40, 543049), (52, 417730), (65, 334184), (74, 293540), (104, 208865), (130, 167092), (148, 146770), (185, 117416), (260, 83546), (296, 73385), (370, 58708), (481, 45160), (520, 41773), (740, 29354), (962, 22580), (1129, 19240), (1480, 14677), (1924, 11290), (2258, 9620), (2405, 9032), (3848, 5645), (4516, 4810)]