21015225

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1213}}^1$

素因数の和:1247

約数の個数: 72

約数和(自身を含む): 46967232

約数和(自身を除く): 25952007

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 25, 33, 35, 45, 55, 63, 75, 77, 99, 105, 165, 175, 225, 231, 275, 315, 385, 495, 525, 693, 825, 1155, 1213, 1575, 1925, 2475, 3465, 3639, 5775, 6065, 8491, 10917, 13343, 17325, 18195, 25473, 30325, 40029, 42455, 54585, 66715, 76419, 90975, 93401, 120087, 127365, 200145, 212275, 272925, 280203, 333575, 382095, 467005, 600435, 636825, 840609, 1000725, 1401015, 1910475, 2335025, 3002175, 4203045, 7005075, 21015225]

約数ペア:

[(1, 21015225), (3, 7005075), (5, 4203045), (7, 3002175), (9, 2335025), (11, 1910475), (15, 1401015), (21, 1000725), (25, 840609), (33, 636825), (35, 600435), (45, 467005), (55, 382095), (63, 333575), (75, 280203), (77, 272925), (99, 212275), (105, 200145), (165, 127365), (175, 120087), (225, 93401), (231, 90975), (275, 76419), (315, 66715), (385, 54585), (495, 42455), (525, 40029), (693, 30325), (825, 25473), (1155, 18195), (1213, 17325), (1575, 13343), (1925, 10917), (2475, 8491), (3465, 6065), (3639, 5775)]