21212940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2971}}^1$

素因数の和:3007

約数の個数: 96

約数和(自身を含む): 71898624

約数和(自身を除く): 50685684

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 51, 60, 68, 70, 84, 85, 102, 105, 119, 140, 170, 204, 210, 238, 255, 340, 357, 420, 476, 510, 595, 714, 1020, 1190, 1428, 1785, 2380, 2971, 3570, 5942, 7140, 8913, 11884, 14855, 17826, 20797, 29710, 35652, 41594, 44565, 50507, 59420, 62391, 83188, 89130, 101014, 103985, 124782, 151521, 178260, 202028, 207970, 249564, 252535, 303042, 311955, 353549, 415940, 505070, 606084, 623910, 707098, 757605, 1010140, 1060647, 1247820, 1414196, 1515210, 1767745, 2121294, 3030420, 3535490, 4242588, 5303235, 7070980, 10606470, 21212940]

約数ペア:

[(1, 21212940), (2, 10606470), (3, 7070980), (4, 5303235), (5, 4242588), (6, 3535490), (7, 3030420), (10, 2121294), (12, 1767745), (14, 1515210), (15, 1414196), (17, 1247820), (20, 1060647), (21, 1010140), (28, 757605), (30, 707098), (34, 623910), (35, 606084), (42, 505070), (51, 415940), (60, 353549), (68, 311955), (70, 303042), (84, 252535), (85, 249564), (102, 207970), (105, 202028), (119, 178260), (140, 151521), (170, 124782), (204, 103985), (210, 101014), (238, 89130), (255, 83188), (340, 62391), (357, 59420), (420, 50507), (476, 44565), (510, 41594), (595, 35652), (714, 29710), (1020, 20797), (1190, 17826), (1428, 14855), (1785, 11884), (2380, 8913), (2971, 7140), (3570, 5942)]