21285828

素因数分解:

$2^2\times 3^5\times {\mathrm{61}}^1\times {\mathrm{359}}^1$

素因数の和:439

約数の個数: 72

約数和(自身を含む): 56871360

約数和(自身を除く): 35585532

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 61, 81, 108, 122, 162, 183, 243, 244, 324, 359, 366, 486, 549, 718, 732, 972, 1077, 1098, 1436, 1647, 2154, 2196, 3231, 3294, 4308, 4941, 6462, 6588, 9693, 9882, 12924, 14823, 19386, 19764, 21899, 29079, 29646, 38772, 43798, 58158, 59292, 65697, 87237, 87596, 116316, 131394, 174474, 197091, 262788, 348948, 394182, 591273, 788364, 1182546, 1773819, 2365092, 3547638, 5321457, 7095276, 10642914, 21285828]

約数ペア:

[(1, 21285828), (2, 10642914), (3, 7095276), (4, 5321457), (6, 3547638), (9, 2365092), (12, 1773819), (18, 1182546), (27, 788364), (36, 591273), (54, 394182), (61, 348948), (81, 262788), (108, 197091), (122, 174474), (162, 131394), (183, 116316), (243, 87596), (244, 87237), (324, 65697), (359, 59292), (366, 58158), (486, 43798), (549, 38772), (718, 29646), (732, 29079), (972, 21899), (1077, 19764), (1098, 19386), (1436, 14823), (1647, 12924), (2154, 9882), (2196, 9693), (3231, 6588), (3294, 6462), (4308, 4941)]