21298480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{521}}^1$

素因数の和:614

約数の個数: 80

約数和(自身を含む): 57478464

約数和(自身を除く): 36179984

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 73, 80, 112, 140, 146, 280, 292, 365, 511, 521, 560, 584, 730, 1022, 1042, 1168, 1460, 2044, 2084, 2555, 2605, 2920, 3647, 4088, 4168, 5110, 5210, 5840, 7294, 8176, 8336, 10220, 10420, 14588, 18235, 20440, 20840, 29176, 36470, 38033, 40880, 41680, 58352, 72940, 76066, 145880, 152132, 190165, 266231, 291760, 304264, 380330, 532462, 608528, 760660, 1064924, 1331155, 1521320, 2129848, 2662310, 3042640, 4259696, 5324620, 10649240, 21298480]

約数ペア:

[(1, 21298480), (2, 10649240), (4, 5324620), (5, 4259696), (7, 3042640), (8, 2662310), (10, 2129848), (14, 1521320), (16, 1331155), (20, 1064924), (28, 760660), (35, 608528), (40, 532462), (56, 380330), (70, 304264), (73, 291760), (80, 266231), (112, 190165), (140, 152132), (146, 145880), (280, 76066), (292, 72940), (365, 58352), (511, 41680), (521, 40880), (560, 38033), (584, 36470), (730, 29176), (1022, 20840), (1042, 20440), (1168, 18235), (1460, 14588), (2044, 10420), (2084, 10220), (2555, 8336), (2605, 8176), (2920, 7294), (3647, 5840), (4088, 5210), (4168, 5110)]