9901990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:241

約数の個数: 64

約数和(自身を含む): 22114944

約数和(自身を除く): 12212954

約数列:

[1, 2, 5, 7, 10, 14, 17, 34, 35, 53, 70, 85, 106, 119, 157, 170, 238, 265, 314, 371, 530, 595, 742, 785, 901, 1099, 1190, 1570, 1802, 1855, 2198, 2669, 3710, 4505, 5338, 5495, 6307, 8321, 9010, 10990, 12614, 13345, 16642, 18683, 26690, 31535, 37366, 41605, 58247, 63070, 83210, 93415, 116494, 141457, 186830, 282914, 291235, 582470, 707285, 990199, 1414570, 1980398, 4950995, 9901990]

約数ペア:

[(1, 9901990), (2, 4950995), (5, 1980398), (7, 1414570), (10, 990199), (14, 707285), (17, 582470), (34, 291235), (35, 282914), (53, 186830), (70, 141457), (85, 116494), (106, 93415), (119, 83210), (157, 63070), (170, 58247), (238, 41605), (265, 37366), (314, 31535), (371, 26690), (530, 18683), (595, 16642), (742, 13345), (785, 12614), (901, 10990), (1099, 9010), (1190, 8321), (1570, 6307), (1802, 5495), (1855, 5338), (2198, 4505), (2669, 3710)]