644612605

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{1987}}^1$

素因数の和:2066

約数の個数: 64

約数和(自身を含む): 1025998848

約数和(自身を除く): 381386243

約数列:

[1, 5, 7, 13, 23, 31, 35, 65, 91, 115, 155, 161, 217, 299, 403, 455, 713, 805, 1085, 1495, 1987, 2015, 2093, 2821, 3565, 4991, 9269, 9935, 10465, 13909, 14105, 24955, 25831, 45701, 46345, 61597, 64883, 69545, 129155, 180817, 228505, 307985, 319907, 324415, 431179, 594113, 800761, 904085, 1416731, 1599535, 2155895, 2970565, 4003805, 4158791, 5605327, 7083655, 9917117, 18417503, 20793955, 28026635, 49585585, 92087515, 128922521, 644612605]

約数ペア:

[(1, 644612605), (5, 128922521), (7, 92087515), (13, 49585585), (23, 28026635), (31, 20793955), (35, 18417503), (65, 9917117), (91, 7083655), (115, 5605327), (155, 4158791), (161, 4003805), (217, 2970565), (299, 2155895), (403, 1599535), (455, 1416731), (713, 904085), (805, 800761), (1085, 594113), (1495, 431179), (1987, 324415), (2015, 319907), (2093, 307985), (2821, 228505), (3565, 180817), (4991, 129155), (9269, 69545), (9935, 64883), (10465, 61597), (13909, 46345), (14105, 45701), (24955, 25831)]