55402520

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:348

約数の個数: 64

約数和(自身を含む): 128066400

約数和(自身を除く): 72663880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 109, 131, 194, 218, 262, 388, 436, 485, 524, 545, 655, 776, 872, 970, 1048, 1090, 1310, 1940, 2180, 2620, 3880, 4360, 5240, 10573, 12707, 14279, 21146, 25414, 28558, 42292, 50828, 52865, 57116, 63535, 71395, 84584, 101656, 105730, 114232, 127070, 142790, 211460, 254140, 285580, 422920, 508280, 571160, 1385063, 2770126, 5540252, 6925315, 11080504, 13850630, 27701260, 55402520]

約数ペア:

[(1, 55402520), (2, 27701260), (4, 13850630), (5, 11080504), (8, 6925315), (10, 5540252), (20, 2770126), (40, 1385063), (97, 571160), (109, 508280), (131, 422920), (194, 285580), (218, 254140), (262, 211460), (388, 142790), (436, 127070), (485, 114232), (524, 105730), (545, 101656), (655, 84584), (776, 71395), (872, 63535), (970, 57116), (1048, 52865), (1090, 50828), (1310, 42292), (1940, 28558), (2180, 25414), (2620, 21146), (3880, 14279), (4360, 12707), (5240, 10573)]