21121168

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{439}}^1$

素因数の和:575

約数の個数: 40

約数和(自身を含む): 42775040

約数和(自身を除く): 21653872

約数列:

[1, 2, 4, 8, 16, 31, 62, 97, 124, 194, 248, 388, 439, 496, 776, 878, 1552, 1756, 3007, 3512, 6014, 7024, 12028, 13609, 24056, 27218, 42583, 48112, 54436, 85166, 108872, 170332, 217744, 340664, 681328, 1320073, 2640146, 5280292, 10560584, 21121168]

約数ペア:

[(1, 21121168), (2, 10560584), (4, 5280292), (8, 2640146), (16, 1320073), (31, 681328), (62, 340664), (97, 217744), (124, 170332), (194, 108872), (248, 85166), (388, 54436), (439, 48112), (496, 42583), (776, 27218), (878, 24056), (1552, 13609), (1756, 12028), (3007, 7024), (3512, 6014)]