28781840

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{3709}}^1$

素因数の和:3819

約数の個数: 40

約数和(自身を含む): 67625880

約数和(自身を除く): 38844040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 3709, 3880, 7418, 7760, 14836, 18545, 29672, 37090, 59344, 74180, 148360, 296720, 359773, 719546, 1439092, 1798865, 2878184, 3597730, 5756368, 7195460, 14390920, 28781840]

約数ペア:

[(1, 28781840), (2, 14390920), (4, 7195460), (5, 5756368), (8, 3597730), (10, 2878184), (16, 1798865), (20, 1439092), (40, 719546), (80, 359773), (97, 296720), (194, 148360), (388, 74180), (485, 59344), (776, 37090), (970, 29672), (1552, 18545), (1940, 14836), (3709, 7760), (3880, 7418)]