21997980

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{367}}^1$

素因数の和:425

約数の個数: 120

約数和(自身を含む): 71066688

約数和(自身を除く): 49068708

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 37, 45, 54, 60, 74, 81, 90, 108, 111, 135, 148, 162, 180, 185, 222, 270, 324, 333, 367, 370, 405, 444, 540, 555, 666, 734, 740, 810, 999, 1101, 1110, 1332, 1468, 1620, 1665, 1835, 1998, 2202, 2220, 2997, 3303, 3330, 3670, 3996, 4404, 4995, 5505, 5994, 6606, 6660, 7340, 9909, 9990, 11010, 11988, 13212, 13579, 14985, 16515, 19818, 19980, 22020, 27158, 29727, 29970, 33030, 39636, 40737, 49545, 54316, 59454, 59940, 66060, 67895, 81474, 99090, 118908, 122211, 135790, 148635, 162948, 198180, 203685, 244422, 271580, 297270, 366633, 407370, 488844, 594540, 611055, 733266, 814740, 1099899, 1222110, 1466532, 1833165, 2199798, 2444220, 3666330, 4399596, 5499495, 7332660, 10998990, 21997980]

約数ペア:

[(1, 21997980), (2, 10998990), (3, 7332660), (4, 5499495), (5, 4399596), (6, 3666330), (9, 2444220), (10, 2199798), (12, 1833165), (15, 1466532), (18, 1222110), (20, 1099899), (27, 814740), (30, 733266), (36, 611055), (37, 594540), (45, 488844), (54, 407370), (60, 366633), (74, 297270), (81, 271580), (90, 244422), (108, 203685), (111, 198180), (135, 162948), (148, 148635), (162, 135790), (180, 122211), (185, 118908), (222, 99090), (270, 81474), (324, 67895), (333, 66060), (367, 59940), (370, 59454), (405, 54316), (444, 49545), (540, 40737), (555, 39636), (666, 33030), (734, 29970), (740, 29727), (810, 27158), (999, 22020), (1101, 19980), (1110, 19818), (1332, 16515), (1468, 14985), (1620, 13579), (1665, 13212), (1835, 11988), (1998, 11010), (2202, 9990), (2220, 9909), (2997, 7340), (3303, 6660), (3330, 6606), (3670, 5994), (3996, 5505), (4404, 4995)]