389627984

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{21011}}^1$

素因数の和:21099

約数の個数: 40

約数和(自身を含む): 807701280

約数和(自身を除く): 418073296

約数列:

[1, 2, 4, 8, 16, 19, 38, 61, 76, 122, 152, 244, 304, 488, 976, 1159, 2318, 4636, 9272, 18544, 21011, 42022, 84044, 168088, 336176, 399209, 798418, 1281671, 1596836, 2563342, 3193672, 5126684, 6387344, 10253368, 20506736, 24351749, 48703498, 97406996, 194813992, 389627984]

約数ペア:

[(1, 389627984), (2, 194813992), (4, 97406996), (8, 48703498), (16, 24351749), (19, 20506736), (38, 10253368), (61, 6387344), (76, 5126684), (122, 3193672), (152, 2563342), (244, 1596836), (304, 1281671), (488, 798418), (976, 399209), (1159, 336176), (2318, 168088), (4636, 84044), (9272, 42022), (18544, 21011)]