19722890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{199}}^1$

素因数の和:287

約数の個数: 64

約数和(自身を含む): 41990400

約数和(自身を除く): 22267510

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 53, 55, 85, 106, 110, 170, 187, 199, 265, 374, 398, 530, 583, 901, 935, 995, 1166, 1802, 1870, 1990, 2189, 2915, 3383, 4378, 4505, 5830, 6766, 9010, 9911, 10547, 10945, 16915, 19822, 21094, 21890, 33830, 37213, 49555, 52735, 74426, 99110, 105470, 116017, 179299, 186065, 232034, 358598, 372130, 580085, 896495, 1160170, 1792990, 1972289, 3944578, 9861445, 19722890]

約数ペア:

[(1, 19722890), (2, 9861445), (5, 3944578), (10, 1972289), (11, 1792990), (17, 1160170), (22, 896495), (34, 580085), (53, 372130), (55, 358598), (85, 232034), (106, 186065), (110, 179299), (170, 116017), (187, 105470), (199, 99110), (265, 74426), (374, 52735), (398, 49555), (530, 37213), (583, 33830), (901, 21890), (935, 21094), (995, 19822), (1166, 16915), (1802, 10945), (1870, 10547), (1990, 9911), (2189, 9010), (2915, 6766), (3383, 5830), (4378, 4505)]