128143820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{229}}^1\times {\mathrm{571}}^1$

素因数の和:823

約数の個数: 72

約数和(自身を含む): 314954640

約数和(自身を除く): 186810820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 229, 245, 458, 490, 571, 916, 980, 1142, 1145, 1603, 2284, 2290, 2855, 3206, 3997, 4580, 5710, 6412, 7994, 8015, 11221, 11420, 15988, 16030, 19985, 22442, 27979, 32060, 39970, 44884, 55958, 56105, 79940, 111916, 112210, 130759, 139895, 224420, 261518, 279790, 523036, 559580, 653795, 915313, 1307590, 1830626, 2615180, 3661252, 4576565, 6407191, 9153130, 12814382, 18306260, 25628764, 32035955, 64071910, 128143820]

約数ペア:

[(1, 128143820), (2, 64071910), (4, 32035955), (5, 25628764), (7, 18306260), (10, 12814382), (14, 9153130), (20, 6407191), (28, 4576565), (35, 3661252), (49, 2615180), (70, 1830626), (98, 1307590), (140, 915313), (196, 653795), (229, 559580), (245, 523036), (458, 279790), (490, 261518), (571, 224420), (916, 139895), (980, 130759), (1142, 112210), (1145, 111916), (1603, 79940), (2284, 56105), (2290, 55958), (2855, 44884), (3206, 39970), (3997, 32060), (4580, 27979), (5710, 22442), (6412, 19985), (7994, 16030), (8015, 15988), (11221, 11420)]